/* $Id: isdn.h,v 1.125.2.3 2004/02/10 01:07:14 keil Exp $
 *
 * Main header for the Linux ISDN subsystem (linklevel).
 *
 * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
 * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
 * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#ifndef __ISDN_H__
#define __ISDN_H__

#include <linux/ioctl.h>

#define ISDN_MAX_DRIVERS    32
#define ISDN_MAX_CHANNELS   64

/* New ioctl-codes */
#define IIOCNETAIF  _IO('I',1)
#define IIOCNETDIF  _IO('I',2)
#define IIOCNETSCF  _IO('I',3)
#define IIOCNETGCF  _IO('I',4)
#define IIOCNETANM  _IO('I',5)
#define IIOCNETDNM  _IO('I',6)
#define IIOCNETGNM  _IO('I',7)
#define IIOCGETSET  _IO('I',8)	/* no longer supported */
#define IIOCSETSET  _IO('I',9)	/* no longer supported */
#define IIOCSETVER  _IO('I',10)
#define IIOCNETHUP  _IO('I',11)
#define IIOCSETGST  _IO('I',12)
#define IIOCSETBRJ  _IO('I',13)
#define IIOCSIGPRF  _IO('I',14)
#define IIOCGETPRF  _IO('I',15)
#define IIOCSETPRF  _IO('I',16)
#define IIOCGETMAP  _IO('I',17)
#define IIOCSETMAP  _IO('I',18)
#define IIOCNETASL  _IO('I',19)
#define IIOCNETDIL  _IO('I',20)
#define IIOCGETCPS  _IO('I',21)
#define IIOCGETDVR  _IO('I',22)
#define IIOCNETLCR  _IO('I',23)	/* dwabc ioctl for LCR from isdnlog */
#define IIOCNETDWRSET  _IO('I',24)	/* dwabc ioctl to reset abc-values to default on a net-interface */

#define IIOCNETALN  _IO('I',32)
#define IIOCNETDLN  _IO('I',33)

#define IIOCNETGPN  _IO('I',34)

#define IIOCDBGVAR  _IO('I',127)

#define IIOCDRVCTL  _IO('I',128)

/* cisco hdlck device private ioctls */
#define SIOCGKEEPPERIOD	(SIOCDEVPRIVATE + 0)
#define SIOCSKEEPPERIOD	(SIOCDEVPRIVATE + 1)
#define SIOCGDEBSERINT	(SIOCDEVPRIVATE + 2)
#define SIOCSDEBSERINT	(SIOCDEVPRIVATE + 3)

/* Packet encapsulations for net-interfaces */
#define ISDN_NET_ENCAP_ETHER      0
#define ISDN_NET_ENCAP_RAWIP      1
#define ISDN_NET_ENCAP_IPTYP      2
#define ISDN_NET_ENCAP_CISCOHDLC  3	/* Without SLARP and keepalive */
#define ISDN_NET_ENCAP_SYNCPPP    4
#define ISDN_NET_ENCAP_UIHDLC     5
#define ISDN_NET_ENCAP_CISCOHDLCK 6	/* With SLARP and keepalive    */
#define ISDN_NET_ENCAP_X25IFACE   7	/* Documentation/networking/x25-iface.txt */
#define ISDN_NET_ENCAP_MAX_ENCAP  ISDN_NET_ENCAP_X25IFACE

/* Facility which currently uses an ISDN-channel */
#define ISDN_USAGE_NONE       0
#define ISDN_USAGE_RAW        1
#define ISDN_USAGE_MODEM      2
#define ISDN_USAGE_NET        3
#define ISDN_USAGE_VOICE      4
#define ISDN_USAGE_FAX        5
#define ISDN_USAGE_MASK       7	/* Mask to get plain usage */
#define ISDN_USAGE_DISABLED  32	/* This bit is set, if channel is disabled */
#define ISDN_USAGE_EXCLUSIVE 64	/* This bit is set, if channel is exclusive */
#define ISDN_USAGE_OUTGOING 128	/* This bit is set, if channel is outgoing  */

#define ISDN_MODEM_NUMREG    24	/* Number of Modem-Registers        */
#define ISDN_LMSNLEN         255	/* Length of tty's Listen-MSN string */
#define ISDN_CMSGLEN	     50	/* Length of CONNECT-Message to add for Modem */

#define ISDN_MSNLEN          32
#define NET_DV 0x06		/* Data version for isdn_net_ioctl_cfg   */
#define TTY_DV 0x06		/* Data version for iprofd etc.          */

#define INF_DV 0x01		/* Data version for /dev/isdninfo        */

typedef struct {
	char drvid[25];
	unsigned long arg;
} isdn_ioctl_struct;

typedef struct {
	char name[10];
	char phone[ISDN_MSNLEN];
	int outgoing;
} isdn_net_ioctl_phone;

typedef struct {
	char name[10];		/* Name of interface                     */
	char master[10];	/* Name of Master for Bundling           */
	char slave[10];		/* Name of Slave for Bundling            */
	char eaz[256];		/* EAZ/MSN                               */
	char drvid[25];		/* DriverId for Bindings                 */
	int onhtime;		/* Hangup-Timeout                        */
	int charge;		/* Charge-Units                          */
	int l2_proto;		/* Layer-2 protocol                      */
	int l3_proto;		/* Layer-3 protocol                      */
	int p_encap;		/* Encapsulation                         */
	int exclusive;		/* Channel, if bound exclusive           */
	int dialmax;		/* Dial Retry-Counter                    */
	int slavedelay;		/* Delay until slave starts up           */
	int cbdelay;		/* Delay before Callback                 */
	int chargehup;		/* Flag: Charge-Hangup                   */
	int ihup;		/* Flag: Hangup-Timeout on incoming line */
	int secure;		/* Flag: Secure                          */
	int callback;		/* Flag: Callback                        */
	int cbhup;		/* Flag: Reject Call before Callback     */
	int pppbind;		/* ippp device for bindings              */
	int chargeint;		/* Use fixed charge interval length      */
	int triggercps;		/* BogoCPS needed for triggering slave   */
	int dialtimeout;	/* Dial-Timeout                          */
	int dialwait;		/* Time to wait after failed dial        */
	int dialmode;		/* Flag: off / on / auto                 */
} isdn_net_ioctl_cfg;

#define ISDN_NET_DIALMODE_MASK  0xC0	/* bits for status                */
#define ISDN_NET_DM_OFF	        0x00	/* this interface is stopped      */
#define ISDN_NET_DM_MANUAL	0x40	/* this interface is on (manual)  */
#define ISDN_NET_DM_AUTO	0x80	/* this interface is autodial     */
#define ISDN_NET_DIALMODE(x) ((&(x))->flags & ISDN_NET_DIALMODE_MASK)

#ifdef __KERNEL__

#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/major.h>
#include <asm/io.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/wait.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_reg.h>
#include <linux/fcntl.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/in.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/tcp.h>
#include <linux/mutex.h>

#define ISDN_TTY_MAJOR    43
#define ISDN_TTYAUX_MAJOR 44
#define ISDN_MAJOR        45

/* The minor-devicenumbers for Channel 0 and 1 are used as arguments for
 * physical Channel-Mapping, so they MUST NOT be changed without changing
 * the correspondent code in isdn.c
 */

#define ISDN_MINOR_B        0
#define ISDN_MINOR_BMAX     (ISDN_MAX_CHANNELS-1)
#define ISDN_MINOR_CTRL     64
#define ISDN_MINOR_CTRLMAX  (64 + (ISDN_MAX_CHANNELS-1))
#define ISDN_MINOR_PPP      128
#define ISDN_MINOR_PPPMAX   (128 + (ISDN_MAX_CHANNELS-1))
#define ISDN_MINOR_STATUS   255

#ifdef CONFIG_ISDN_PPP

#ifdef CONFIG_ISDN_PPP_VJ
#include <net/slhc_vj.h>
#endif

#include <linux/ppp_defs.h>
#include <linux/if_ppp.h>

#include <linux/isdn_ppp.h>
#endif

#ifdef CONFIG_ISDN_X25
#include <linux/concap.h>
#endif

#include <linux/isdnif.h>

#define ISDN_DRVIOCTL_MASK       0x7f	/* Mask for Device-ioctl */

/* Until now unused */
#define ISDN_SERVICE_VOICE 1
#define ISDN_SERVICE_AB    1<<1
#define ISDN_SERVICE_X21   1<<2
#define ISDN_SERVICE_G4    1<<3
#define ISDN_SERVICE_BTX   1<<4
#define ISDN_SERVICE_DFUE  1<<5
#define ISDN_SERVICE_X25   1<<6
#define ISDN_SERVICE_TTX   1<<7
#define ISDN_SERVICE_MIXED 1<<8
#define ISDN_SERVICE_FW    1<<9
#define ISDN_SERVICE_GTEL  1<<10
#define ISDN_SERVICE_BTXN  1<<11
#define ISDN_SERVICE_BTEL  1<<12

/* Macros checking plain usage */
#define USG_NONE(x)         ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)
#define USG_RAW(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW)
#define USG_MODEM(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)
#define USG_VOICE(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)
#define USG_NET(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET)
#define USG_FAX(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX)
#define USG_OUTGOING(x)     ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING)
#define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \
                             ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)     )

/* Timer-delays and scheduling-flags */
#define ISDN_TIMER_RES         4	/* Main Timer-Resolution   */
#define ISDN_TIMER_02SEC       (HZ/ISDN_TIMER_RES/5)	/* Slow-Timer1 .2 sec      */
#define ISDN_TIMER_1SEC        (HZ/ISDN_TIMER_RES)	/* Slow-Timer2 1 sec       */
#define ISDN_TIMER_RINGING     5	/* tty RINGs = ISDN_TIMER_1SEC * this factor       */
#define ISDN_TIMER_KEEPINT    10	/* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */
#define ISDN_TIMER_MODEMREAD   1
#define ISDN_TIMER_MODEMPLUS   2
#define ISDN_TIMER_MODEMRING   4
#define ISDN_TIMER_MODEMXMIT   8
#define ISDN_TIMER_NETDIAL    16
#define ISDN_TIMER_NETHANGUP  32
#define ISDN_TIMER_CARRIER   256	/* Wait for Carrier */
#define ISDN_TIMER_FAST      (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \
                              ISDN_TIMER_MODEMXMIT)
#define ISDN_TIMER_SLOW      (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \
                              ISDN_TIMER_NETDIAL | ISDN_TIMER_CARRIER)

/* Timeout-Values for isdn_net_dial() */
#define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
#define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
#define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))

/* GLOBAL_FLAGS */
#define ISDN_GLOBAL_STOPPED 1

/*=================== Start of ip-over-ISDN stuff =========================*/

/* Feature- and status-flags for a net-interface */
#define ISDN_NET_CONNECTED  0x01	/* Bound to ISDN-Channel             */
#define ISDN_NET_SECURE     0x02	/* Accept calls from phonelist only  */
#define ISDN_NET_CALLBACK   0x04	/* activate callback                 */
#define ISDN_NET_CBHUP      0x08	/* hangup before callback            */
#define ISDN_NET_CBOUT      0x10	/* remote machine does callback      */

#define ISDN_NET_MAGIC      0x49344C02	/* for paranoia-checking             */

/* Phone-list-element */
typedef struct {
	void *next;
	char num[ISDN_MSNLEN];
} isdn_net_phone;

/*
   Principles when extending structures for generic encapsulation protocol
   ("concap") support:
   - Stuff which is hardware specific (here i4l-specific) goes in 
     the netdev -> local structure (here: isdn_net_local)
   - Stuff which is encapsulation protocol specific goes in the structure
     which holds the linux device structure (here: isdn_net_device)
*/

/* Local interface-data */
typedef struct isdn_net_local_s {
	ulong magic;
	struct net_device_stats stats;	/* Ethernet Statistics              */
	int isdn_device;	/* Index to isdn-device             */
	int isdn_channel;	/* Index to isdn-channel            */
	int ppp_slot;		/* PPPD device slot number          */
	int pre_device;		/* Preselected isdn-device          */
	int pre_channel;	/* Preselected isdn-channel         */
	int exclusive;		/* If non-zero idx to reserved chan. */
	int flags;		/* Connection-flags                 */
	int dialretry;		/* Counter for Dialout-retries      */
	int dialmax;		/* Max. Number of Dial-retries      */
	int cbdelay;		/* Delay before Callback starts     */
	int dtimer;		/* Timeout-counter for dialing      */
	char msn[ISDN_MSNLEN];	/* MSNs/EAZs for this interface */
	u_char cbhup;		/* Flag: Reject Call before Callback */
	u_char dialstate;	/* State for dialing                */
	u_char p_encap;		/* Packet encapsulation             */
	/*   0 = Ethernet over ISDN         */
	/*   1 = RAW-IP                     */
	/*   2 = IP with type field         */
	u_char l2_proto;	/* Layer-2-protocol                 */
	/* See ISDN_PROTO_L2..-constants in */
	/* isdnif.h                         */
	/*   0 = X75/LAPB with I-Frames     */
	/*   1 = X75/LAPB with UI-Frames    */
	/*   2 = X75/LAPB with BUI-Frames   */
	/*   3 = HDLC                       */
	u_char l3_proto;	/* Layer-3-protocol                 */
	/* See ISDN_PROTO_L3..-constants in */
	/* isdnif.h                         */
	/*   0 = Transparent                */
	int huptimer;		/* Timeout-counter for auto-hangup  */
	int charge;		/* Counter for charging units       */
	ulong chargetime;	/* Timer for Charging info          */
	int hupflags;		/* Flags for charge-unit-hangup:    */
	/* bit0: chargeint is invalid       */
	/* bit1: Getting charge-interval    */
	/* bit2: Do charge-unit-hangup      */
	/* bit3: Do hangup even on incoming */
	int outgoing;		/* Flag: outgoing call              */
	int onhtime;		/* Time to keep link up             */
	int chargeint;		/* Interval between charge-infos    */
	int onum;		/* Flag: at least 1 outgoing number */
	int cps;		/* current speed of this interface  */
	int transcount;		/* byte-counter for cps-calculation */
	int sqfull;		/* Flag: netdev-queue overloaded    */
	ulong sqfull_stamp;	/* Start-Time of overload           */
	ulong slavedelay;	/* Dynamic bundling delaytime       */
	int triggercps;		/* BogoCPS needed for trigger slave */
	isdn_net_phone *phone[2];	/* List of remote-phonenumbers      */
	/* phone[0] = Incoming Numbers      */
	/* phone[1] = Outgoing Numbers      */
	isdn_net_phone *dial;	/* Pointer to dialed number         */
	struct net_device *master;	/* Ptr to Master device for slaves  */
	struct net_device *slave;	/* Ptr to Slave device for masters  */
	struct isdn_net_local_s *next;	/* Ptr to next link in bundle       */
	struct isdn_net_local_s *last;	/* Ptr to last link in bundle       */
	struct isdn_net_dev_s *netdev;	/* Ptr to netdev                    */
	struct sk_buff_head super_tx_queue;	/* List of supervisory frames to  */
	/* be transmitted asap              */
	atomic_t frame_cnt;	/* number of frames currently       */
	/* queued in HL driver              */
	/* Ptr to orig. hard_header_cache   */
	spinlock_t xmit_lock;	/* used to protect the xmit path of */
	/* a particular channel (including  */
	/* the frame_cnt                    */

	int pppbind;		/* ippp device for bindings         */
	int dialtimeout;	/* How long shall we try on dialing? (jiffies) */
	int dialwait;		/* How long shall we wait after failed attempt? (jiffies) */
	ulong dialstarted;	/* jiffies of first dialing-attempt */
	ulong dialwait_timer;	/* jiffies of earliest next dialing-attempt */
	int huptimeout;		/* How long will the connection be up? (seconds) */
#ifdef CONFIG_ISDN_X25
	struct concap_device_ops *dops;	/* callbacks used by encapsulator   */
#endif
	/* use an own struct for that in later versions */
	ulong cisco_myseq;	/* Local keepalive seq. for Cisco   */
	ulong cisco_mineseen;	/* returned keepalive seq. from remote */
	ulong cisco_yourseq;	/* Remote keepalive seq. for Cisco  */
	int cisco_keepalive_period;	/* keepalive period */
	ulong cisco_last_slarp_in;	/* jiffie of last keepalive packet we received */
	char cisco_line_state;	/* state of line according to keepalive packets */
	char cisco_debserint;	/* debugging flag of cisco hdlc with slarp */
	struct timer_list cisco_timer;
	struct work_struct tqueue;
} isdn_net_local;

/* the interface itself */
typedef struct isdn_net_dev_s {
	isdn_net_local *local;
	isdn_net_local *queue;	/* circular list of all bundled
				   channels, which are currently
				   online                           */
	spinlock_t queue_lock;	/* lock to protect queue            */
	void *next;		/* Pointer to next isdn-interface   */
	struct net_device *dev;	/* interface to upper levels        */
#ifdef CONFIG_ISDN_PPP
	ippp_bundle *pb;	/* pointer to the common bundle structure
				 * with the per-bundle data */
#endif
#ifdef CONFIG_ISDN_X25
	struct concap_proto *cprot;	/* connection oriented encapsulation protocol */
#endif

} isdn_net_dev;

/*===================== End of ip-over-ISDN stuff ===========================*/

/*======================= Start of ISDN-tty stuff ===========================*/

#define ISDN_ASYNC_MAGIC          0x49344C01	/* for paranoia-checking        */
#define ISDN_ASYNC_INITIALIZED	  0x80000000	/* port was initialized         */
#define ISDN_ASYNC_CALLOUT_ACTIVE 0x40000000	/* Call out device active       */
#define ISDN_ASYNC_NORMAL_ACTIVE  0x20000000	/* Normal device active         */
#define ISDN_ASYNC_CLOSING	  0x08000000	/* Serial port is closing       */
#define ISDN_ASYNC_CTS_FLOW	  0x04000000	/* Do CTS flow control          */
#define ISDN_ASYNC_CHECK_CD	  0x02000000	/* i.e., CLOCAL                 */
#define ISDN_ASYNC_HUP_NOTIFY         0x0001	/* Notify tty on hangups/closes */
#define ISDN_ASYNC_SESSION_LOCKOUT    0x0100	/* Lock cua opens on session    */
#define ISDN_ASYNC_PGRP_LOCKOUT       0x0200	/* Lock cua opens on pgrp       */
#define ISDN_ASYNC_CALLOUT_NOHUP      0x0400	/* No hangup for cui            */
#define ISDN_ASYNC_SPLIT_TERMIOS      0x0008	/* Sep. termios for dialin/out  */
#define ISDN_SERIAL_XMIT_SIZE           1024	/* Default bufsize for write    */
#define ISDN_SERIAL_XMIT_MAX            4000	/* Maximum bufsize for write    */
#define ISDN_SERIAL_TYPE_NORMAL            1
#define ISDN_SERIAL_TYPE_CALLOUT           2

#ifdef CONFIG_ISDN_AUDIO
/* For using sk_buffs with audio we need some private variables
 * within each sk_buff. For this purpose, we declare a struct here,
 * and put it always at the private skb->cb data array. A few macros help
 * accessing the variables.
 */
typedef struct _isdn_audio_data {
	unsigned short dle_count;
	unsigned char lock;
} isdn_audio_data_t;

#define ISDN_AUDIO_SKB_DLECOUNT(skb)	(((isdn_audio_data_t *)&skb->cb[0])->dle_count)
#define ISDN_AUDIO_SKB_LOCK(skb)	(((isdn_audio_data_t *)&skb->cb[0])->lock)
#endif

/* Private data of AT-command-interpreter */
typedef struct atemu {
	u_char profile[ISDN_MODEM_NUMREG];	/* Modem-Regs. Profile 0              */
	u_char mdmreg[ISDN_MODEM_NUMREG];	/* Modem-Registers                    */
	char pmsn[ISDN_MSNLEN];	/* EAZ/MSNs Profile 0                 */
	char msn[ISDN_MSNLEN];	/* EAZ/MSN                            */
	char plmsn[ISDN_LMSNLEN];	/* Listening MSNs Profile 0           */
	char lmsn[ISDN_LMSNLEN];	/* Listening MSNs                     */
	char cpn[ISDN_MSNLEN];	/* CalledPartyNumber on incoming call */
	char connmsg[ISDN_CMSGLEN];	/* CONNECT-Msg from HL-Driver         */
#ifdef CONFIG_ISDN_AUDIO
	u_char vpar[10];	/* Voice-parameters                   */
	int lastDLE;		/* Flag for voice-coding: DLE seen    */
#endif
	int mdmcmdl;		/* Length of Modem-Commandbuffer      */
	int pluscount;		/* Counter for +++ sequence           */
	u_long lastplus;	/* Timestamp of last +                */
	int carrierwait;	/* Seconds of carrier waiting         */
	char mdmcmd[255];	/* Modem-Commandbuffer                */
	unsigned int charge;	/* Charge units of current connection */
} atemu;

/* Private data (similar to async_struct in <linux/serial.h>) */
typedef struct modem_info {
	int magic;
	struct module *owner;
	int flags;		/* defined in tty.h               */
	int x_char;		/* xon/xoff character             */
	int mcr;		/* Modem control register         */
	int msr;		/* Modem status register          */
	int lsr;		/* Line status register           */
	int line;
	int count;		/* # of fd on device              */
	int blocked_open;	/* # of blocked opens             */
	long session;		/* Session of opening process     */
	long pgrp;		/* pgrp of opening process        */
	int online;		/* 1 = B-Channel is up, drop data */
	/* 2 = B-Channel is up, deliver d. */
	int dialing;		/* Dial in progress or ATA        */
	int rcvsched;		/* Receive needs schedule         */
	int isdn_driver;	/* Index to isdn-driver           */
	int isdn_channel;	/* Index to isdn-channel          */
	int drv_index;		/* Index to dev->usage            */
	int ncarrier;		/* Flag: schedule NO CARRIER      */
	unsigned char last_cause[8];	/* Last cause message             */
	unsigned char last_num[ISDN_MSNLEN];
	/* Last phone-number              */
	unsigned char last_l2;	/* Last layer-2 protocol          */
	unsigned char last_si;	/* Last service                   */
	unsigned char last_lhup;	/* Last hangup local?             */
	unsigned char last_dir;	/* Last direction (in or out)     */
	struct timer_list nc_timer;	/* Timer for delayed NO CARRIER   */
	int send_outstanding;	/* # of outstanding send-requests */
	int xmit_size;		/* max. # of chars in xmit_buf    */
	int xmit_count;		/* # of chars in xmit_buf         */
	unsigned char *xmit_buf;	/* transmit buffer                */
	struct sk_buff_head xmit_queue;	/* transmit queue                 */
	atomic_t xmit_lock;	/* Semaphore for isdn_tty_write   */
#ifdef CONFIG_ISDN_AUDIO
	int vonline;		/* Voice-channel status           */
	/* Bit 0 = recording              */
	/* Bit 1 = playback               */
	/* Bit 2 = playback, DLE-ETX seen */
	struct sk_buff_head dtmf_queue;	/* queue for dtmf results         */
	void *adpcms;		/* state for adpcm decompression  */
	void *adpcmr;		/* state for adpcm compression    */
	void *dtmf_state;	/* state for dtmf decoder         */
	void *silence_state;	/* state for silence detection    */
#endif
#ifdef CONFIG_ISDN_TTY_FAX
	struct T30_s *fax;	/* T30 Fax Group 3 data/interface */
	int faxonline;		/* Fax-channel status             */
#endif
	struct tty_struct *tty;	/* Pointer to corresponding tty   */
	atemu emu;		/* AT-emulator data               */
	struct ktermios normal_termios;	/* For saving termios structs     */
	struct ktermios callout_termios;
	wait_queue_head_t open_wait, close_wait;
	spinlock_t readlock;
} modem_info;

#define ISDN_MODEM_WINSIZE 8

/* Description of one ISDN-tty */
typedef struct _isdn_modem {
	int refcount;		/* Number of opens        */
	struct tty_driver *tty_modem;	/* tty-device             */
	struct tty_struct *modem_table[ISDN_MAX_CHANNELS];	/* ?? copied from Orig    */
	struct ktermios *modem_termios[ISDN_MAX_CHANNELS];
	struct ktermios *modem_termios_locked[ISDN_MAX_CHANNELS];
	modem_info info[ISDN_MAX_CHANNELS];	/* Private data           */
} isdn_modem_t;

/*======================= End of ISDN-tty stuff ============================*/

/*======================== Start of V.110 stuff ============================*/
#define V110_BUFSIZE 1024

typedef struct {
	int nbytes;		/* 1 Matrixbyte -> nbytes in stream     */
	int nbits;		/* Number of used bits in streambyte    */
	unsigned char key;	/* Bitmask in stream eg. 11 (nbits=2)   */
	int decodelen;		/* Amount of data in decodebuf          */
	int SyncInit;		/* Number of sync frames to send        */
	unsigned char *OnlineFrame;	/* Precalculated V110 idle frame        */
	unsigned char *OfflineFrame;	/* Precalculated V110 sync Frame        */
	int framelen;		/* Length of frames                     */
	int skbuser;		/* Number of unacked userdata skbs      */
	int skbidle;		/* Number of unacked idle/sync skbs     */
	int introducer;		/* Local vars for decoder               */
	int dbit;
	unsigned char b;
	int skbres;		/* space to reserve in outgoing skb     */
	int maxsize;		/* maxbufsize of lowlevel driver        */
	unsigned char *encodebuf;	/* temporary buffer for encoding        */
	unsigned char decodebuf[V110_BUFSIZE];	/* incomplete V110 matrices     */
} isdn_v110_stream;

/*========================= End of V.110 stuff =============================*/

/*======================= Start of general stuff ===========================*/

typedef struct {
	char *next;
	char *private;
} infostruct;

#define DRV_FLAG_RUNNING 1
#define DRV_FLAG_REJBUS  2
#define DRV_FLAG_LOADED  4

/* Description of hardware-level-driver */
typedef struct _isdn_driver {
	ulong online;		/* Channel-Online flags             */
	ulong flags;		/* Misc driver Flags                */
	int locks;		/* Number of locks for this driver  */
	int channels;		/* Number of channels               */
	wait_queue_head_t st_waitq;	/* Wait-Queue for status-read's     */
	int maxbufsize;		/* Maximum Buffersize supported     */
	unsigned long pktcount;	/* Until now: unused                */
	int stavail;		/* Chars avail on Status-device     */
	isdn_if *interface;	/* Interface to driver              */
	int *rcverr;		/* Error-counters for B-Ch.-receive */
	int *rcvcount;		/* Byte-counters for B-Ch.-receive  */
#ifdef CONFIG_ISDN_AUDIO
	unsigned long DLEflag;	/* Flags: Insert DLE at next read   */
#endif
	struct sk_buff_head *rpqueue;	/* Pointers to start of Rcv-Queue   */
	wait_queue_head_t *rcv_waitq;	/* Wait-Queues for B-Channel-Reads  */
	wait_queue_head_t *snd_waitq;	/* Wait-Queue for B-Channel-Send's  */
	char msn2eaz[10][ISDN_MSNLEN];	/* Mapping-Table MSN->EAZ   */
} isdn_driver_t;

/* Main driver-data */
typedef struct isdn_devt {
	struct module *owner;
	spinlock_t lock;
	unsigned short flags;	/* Bitmapped Flags:           */
	int drivers;		/* Current number of drivers  */
	int channels;		/* Current number of channels */
	int net_verbose;	/* Verbose-Flag               */
	int modempoll;		/* Flag: tty-read active      */
	spinlock_t timerlock;
	int tflags;		/* Timer-Flags:               */
	/*  see ISDN_TIMER_..defines  */
	int global_flags;
	infostruct *infochain;	/* List of open info-devs.    */
	wait_queue_head_t info_waitq;	/* Wait-Queue for isdninfo    */
	struct timer_list timer;	/* Misc.-function Timer       */
	int chanmap[ISDN_MAX_CHANNELS];	/* Map minor->device-channel  */
	int drvmap[ISDN_MAX_CHANNELS];	/* Map minor->driver-index    */
	int usage[ISDN_MAX_CHANNELS];	/* Used by tty/ip/voice       */
	char num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
	/* Remote number of active ch. */
	int m_idx[ISDN_MAX_CHANNELS];	/* Index for mdm....          */
	isdn_driver_t *drv[ISDN_MAX_DRIVERS];	/* Array of drivers           */
	isdn_net_dev *netdev;	/* Linked list of net-if's    */
	char drvid[ISDN_MAX_DRIVERS][20];	/* Driver-ID                 */
	struct task_struct *profd;	/* For iprofd                 */
	isdn_modem_t mdm;	/* tty-driver-data            */
	isdn_net_dev *rx_netdev[ISDN_MAX_CHANNELS];	/* rx netdev-pointers     */
	isdn_net_dev *st_netdev[ISDN_MAX_CHANNELS];	/* stat netdev-pointers   */
	ulong ibytes[ISDN_MAX_CHANNELS];	/* Statistics incoming bytes  */
	ulong obytes[ISDN_MAX_CHANNELS];	/* Statistics outgoing bytes  */
	int v110emu[ISDN_MAX_CHANNELS];	/* V.110 emulator-mode 0=none */
	atomic_t v110use[ISDN_MAX_CHANNELS];	/* Usage-Semaphore for stream */
	isdn_v110_stream *v110[ISDN_MAX_CHANNELS];	/* V.110 private data         */
	struct mutex mtx;	/* serialize list access */
	unsigned long global_features;
} isdn_dev;

extern isdn_dev *dev;

#endif /* __KERNEL__ */

#endif /* __ISDN_H__ */
